[1] Baets B. De: Model implicators and their characterization. In: Proc. First ICSC Internat. Symposium on Fuzzy Logic, Zürich, Switzerland (N. Steele, ed.). ICSC Academic Press 1995, pp. A42–A49

[2] Baets B. De, Fodor J. C.: On the structure of uninorms and their residual implicators. In: Proc. 18th Linz Seminar on Fuzzy Set Theory, Linz, Austria 1997, pp. 81–87

[3] Baets B. De, Fodor J. C.: Residual operators of representable uninorms. In: Proc. Fifth European Congress on Intelligent Techniques and Soft Computing, Volume 1 (H. J. Zimmermann, ed.), ELITE, Aachen, Germany 1997, pp. 52–56

[4] Baets B. De, Mesiar R.: Residual implicators of continuous t-norms. In: Proc. Fourth European Congress on Intelligent Techniques and Soft Computing, Volume 1 (H. J. Zimmermann, ed.), ELITE, Aachen, Germany 1997, pp. 27–31

[5] Baets B. De, Mesiar R.: Triangular norms on product lattices. Fuzzy Sets and Systems 104 (1999), 61–75 MR 1685810 | Zbl 0935.03060

[6] Bustince H., Burillo, P., Soria F.: Automorphisms, negations and implication operators. Fuzzy Sets and Systems 134 (2003), 209–229 MR 1969102

[7] Cignoli R., Esteva F., Godo, L., Montagna F.: On a class of left-continuous t-norms. Fuzzy Sets and Systems 131 (2002), 283–296 MR 1939841

[8] Cignoli R., Esteva F., Godo, L., Torrens A.: Basic fuzzy logic is the logic of continuous t-norms and their residua. Soft Computing 4 (2000), 106–112

[9] Cignoli R., D’Ottaviano, I., Mundici D.: Algebraic Foundations of Many-valued Reasoning. Kluwer, Dordrecht 2000 MR 1786097 | Zbl 0937.06009

[10] Esteva F., Godo L.: Monoidal t-norm based logic: towards a logic for left-continuous t-norms. Fuzzy Sets and Systems 124 (2001), 271–288 MR 1860848 | Zbl 0994.03017

[11] Fodor J. C.: On fuzzy implication operators. Fuzzy Sets and Systems 42 (1991), 293–300 MR 1127976 | Zbl 0736.03006

[12] Fodor J. C.: Contrapositive symmetry of fuzzy implications. Fuzzy Sets and Systems 69 (1995), 141–156 MR 1317882 | Zbl 0845.03007

[13] Fodor J. C.: Smooth associative operations on finite ordinal scales. IEEE Trans. Fuzzy Systems 8 (2000), 791–795

[14] Godo L., Sierra C.: A new approach to connective generation in the framework of expert systems using fuzzy logic. In: Proc. XVIIIth ISMVL, Palma de Mallorca, Spain 1988, pp. 157–162

[15] Hájek P.: Mathematics of Fuzzy Logic. Kluwer, Dordrecht 1998

[16] Hájek P.: Basic fuzzy logic and BL-algebras. Soft Computing 2 (1998), 124–128

[17] Jenei S.: New family of triangular norms via contrapositive symmetrization of residuated implications. Fuzzy Sets and Systems 110 (2000), 157–174 MR 1747749 | Zbl 0941.03059

[18] Mas M., Mayor, G., Torrens J.: $t$-operators and uninorms on a finite totally ordered set. Internat. J. Intelligent Systems (Special Issue: The Mathematics of Fuzzy Sets) 14 (1999), No. 9, 909–922 MR 1691482 | Zbl 0948.68173

[19] Mas M., Monserrat, M., Torrens J.: On left and right uninorms on a finite chain. Fuzzy Sets and Systems, forthcoming MR 2074199 | Zbl 1045.03029

[20] Mas M., Monserrat, M., Torrens J.: Operadores de implicación en una cadena finita. In: Proc. Estylf-2002, León, Spain 2002, pp. 297–302

[21] Mas M., Monserrat, M., Torrens J.: On some types of implications on a finite chain. In: Proc. Summer School on Aggregation Operators 2003 (AGOP’2003), Alcalá de Henares, Spain 2003, pp. 107–112

[22] Mayor G., Torrens J.: On a class of operators for expert systems. Internat. J. Intelligent Systems 8 (1993), No. 7, 771–778 Zbl 0785.68087

[23] Pei D.: $R_0$ implication: characteristics and applications. Fuzzy Sets and Systems 131 (2002), 297–302 MR 1939842 | Zbl 1015.03034

[24] Trillas E., Campo, C. del, Cubillo S.: When QM-operators are implication functions and conditional fuzzy relations. Internat. J. Intelligent Systems 15 (2000), 647–655 Zbl 0953.03031